Design support method, design support system, and design support program for pressed product

Abstract

To provide a method, system, and program for supporting the design of a pressed product without relying on the experience or intangible know-how of workers, and enabling the improvement and succession of technology in press working through this design support.SOLUTION: This design support method includes extracting a characteristic shape from computer-aided data of a pressed product, and analyzing the characteristic shape to determine whether or not the characteristic shape can be realized by press working based on preregistered working constraints for the characteristic shape. The working constraints include limit values of parameters that define the characteristic shape, which are determined using at least one selected from the material, thickness, shape, drawing rate, hole expansion rate, and bending λ value of a workpiece, as well as the press direction, press pressure, rolling direction, working reference plane, and process order during the press working.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] One embodiment of the present invention relates to a method for supporting the design of a pressed product, and a system and a program for implementing the method. [Background technology]

[0002] Press working is one of the most representative plastic processes, and is one of the most suitable processing methods for mass-producing products having various shapes, including three-dimensional shapes, from plate-shaped materials (workpieces). Design support systems are known that determine in advance whether a designed product (press-worked product) can actually be manufactured by press working (see, for example, Patent Documents 1 to 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-151708 A [Patent Document 2] JP 2010-277460 A [Patent Document 3] JP 2007-102282 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of one embodiment of the present invention is to provide a novel method, system, and program for supporting the design of a pressed product. Alternatively, an object of one embodiment of the present invention is to provide a method, system, and program for supporting the design of a pressed product without relying on the experience or intangible know-how of an operator, and for enabling the improvement and inheritance of press working techniques through this design support. [Means for solving the problem]

[0005] One embodiment of the present invention is a design support method for a pressed product. The design support method includes extracting a characteristic shape from computer-aided data of the pressed product, analyzing the characteristic shape, and judging whether the characteristic shape can be realized by press working based on preregistered processing constraints for the characteristic shape. The processing constraints include the material, thickness, shape, reduction ratio, hole expansion ratio, and bending lambda value of the workpiece, as well as limit values ​​of parameters defining the characteristic shape, which are determined using at least one selected from the press direction, press pressure, rolling direction, processing reference plane, and process sequence during press working.

[0006] One embodiment of the present invention is a design support system. The design support system includes a server and a computing device connected to the server so as to be able to communicate with the server. The server is configured to extract a feature shape from computer-aided data of a pressed product, store processing constraints for the feature shape, analyze the feature shape, and determine whether the feature shape can be realized by pressing based on the processing constraints, and transmit the result of the determination to the computing device. The computing device is configured to transmit the computer-aided data to the server and display the result of the determination. The processing constraints include limit values ​​of parameters that define the feature shape, which are determined using at least one selected from the material, thickness, shape, reduction ratio, hole expansion ratio, and bending lambda value of the workpiece, as well as the press direction, press pressure, rolling direction, processing reference plane, and process sequence during pressing.

[0007] One embodiment of the present invention is a design support program. The design support program is configured to cause a computing device communicably connected to a server configured to extract a characteristic shape of a pressed product from computer-aided data to execute the following: (i) sending the computer-aided data to the server, (ii) receiving a result of the server's determination as to whether the characteristic shape can be realized by press working based on the processing constraints of the characteristic shape stored in the server, and (iii) displaying the result of the determination. The processing constraints include the material, thickness, shape, reduction ratio, hole expansion ratio, and bending lambda value of the workpiece, as well as limit values ​​of parameters defining the characteristic shape, which are determined using at least one selected from the press direction, press pressure, rolling direction, processing reference plane, and process sequence during press working. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram of a design support system for a pressed product according to an embodiment of the present invention. [Diagram 2] 4 is a flowchart showing an example of a design support method for a pressed product according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a schematic perspective view of an example of a pressed product. [Figure 4] 1 is an example of a characteristic shape detection script in which processing constraint conditions for characteristic shapes are described, used in a design support method for a pressed product according to one embodiment of the present invention. [Diagram 5] 13 is an example of a display displayed on a computing device of a design support system for a pressed product according to one embodiment of the present invention. [Figure 6] 13 is an example of a display displayed on a computing device of a design support system for a pressed product according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, each embodiment of the present invention will be described with reference to the drawings, etc. However, the present invention can be embodied in various forms without departing from the gist of the present invention, and should not be construed as being limited to the description of the embodiments exemplified below.

[0010] In order to clarify the description, the drawings may show the width, thickness, shape, etc. of each part in a schematic manner compared to the actual embodiment, but these are merely examples and do not limit the interpretation of the present invention. In this specification and each drawing, elements having the same functions as those described in the previous drawings may be given the same reference numerals, and duplicated descriptions may be omitted.

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A design support system, a design support method, and a design support program for a pressed product according to an embodiment of the present invention will be described below.

[0012] 1. Design Support System FIG. 1 shows a block diagram of a design support system 100 according to an embodiment of the present invention. As shown in FIG. 1, the design support system 100 includes a server 102 and at least one computing device 104. The at least one computing device 104 may include a plurality of computing devices 104. The server 102 and the computing device 104 are communicatively connected to each other via a network 120. The network 120 may be an external network such as the Internet, or an internal network such as a LAN (Local Area Network). The server 102 and the computing device 104 may be connected by wire or wirelessly. The server 102 and the computing device 104 may be connected without the network 120. In this case, various information is exchanged between the server 102 and the computing device 104 via a non-volatile memory such as a flash memory. Furthermore, the server 102 and the computing device 104 may be configured to be communicatively connected to a commercially available cloud computer 110 via the network 120.

[0013] The server 102 is an electronic device having at least a calculation function, an information storage function, and a communication function, and a stationary computer is exemplified as the server 102. The server 102 may be connected to a display device having an information display function, or the display device may be built into the server 102. As described later, the server 102 can be configured to extract and analyze the characteristic shape of the pressed product and transmit the result to the computing device 104. In addition, various information such as processing constraint conditions imposed on the characteristic shape and points to note during processing are scripted and stored in a storage device (not shown) in the server 102. This information is so-called know-how in press processing. Although the details will be described later, the server 102 receives computer-aided data (hereinafter, CAD data) of a two-dimensional or three-dimensional model equivalent to a design drawing of the pressed product from the computing device 104. Furthermore, the server 102 is configured to determine whether the characteristic shape can be realized by press processing in the pressed product based on the above-mentioned processing constraint conditions. However, instead of analyzing the CAD data in the server 102 and extracting the characteristic shape of the pressed product, the CAD data may be transmitted from the server 102 or the computing device 104 to the cloud computer 110, and the characteristic shape may be extracted on the cloud computer 110. In this case, information regarding the extracted characteristic shape is transmitted to the server 102.

[0014] Like the server 102, the computing device 104 is also an electronic device having at least a calculation function, an information storage function, a communication function, and an information display function. Examples of the computing device 104 include a stationary personal computer, a notebook personal computer, a tablet, a smartphone, and other portable communication terminals. The computing device 104 may also be connected to a display device, or a display device may be built into the computing device 104. The computing device 104 functions as a graphical user interface (GUI). For this reason, the computing device 104 may be configured to read and store CAD data. Furthermore, the computing device 104 is configured to display the CAD data and a three-dimensional model of a pressed product obtained from the CAD data according to instructions from a design support system program (described later) installed in the computing device 104. The computing device 104 may also be configured to display the three-dimensional model of the pressed product on the display device at any angle or magnification according to instructions from a touch panel built into the display device or a pointing device such as a mouse or a trackball connected to the computing device 104.

[0015] 2.Design support method FIG. 2 is a flowchart showing an example of a design support method according to an embodiment of the present invention.

[0016] (1) Loading CAD data As shown in Fig. 2, first, CAD data of a designed press product is read into the computing device 104. For example, CAD data on the cloud computer 110, CAD data stored in a storage device of the computing device 104, or CAD data stored in a portable storage medium such as a flash memory is read using a design support program according to one embodiment of the present invention. As a result, the three-dimensional structure of the press product is recognized in the computing device 104. Although not shown, at this time, the computing device 104 may display a three-dimensional model of the press product on a display device in accordance with an instruction from the design support program.

[0017] (2) Extraction of characteristic shapes Next, the CAD data is transmitted to the server 102. The server 102 extracts the characteristic shape of the pressed product from the received CAD data using a known algorithm such as a hybrid area segmentation algorithm. At this time, as described above, the extraction of the characteristic shape may not be performed within the server 102, but may be performed in the cloud computer 110, and the result may be received by the server 102.

[0018] An example of a press-formed product is shown in FIG. 3. In the example shown in FIG. 3, various processes such as bending, blanking, hole forming, burring, and boss forming are performed on a plate-shaped workpiece, and as a result, various characteristic shapes are formed in one press-formed product. Although not shown, press working can perform further various processes (drawing, bead forming, rib forming, cut-and-raise, etc.). For this reason, the characteristic shapes are diverse, such as bend R (bending that forms a curve with a radius R), blanking R (a punched shape with a curved surface with a radius R), round holes (through holes with a circular cross section), irregular holes (through holes with a cross section other than a circle), bosses (convex shapes raised on a surface), burring (through holes with a flange), and ribs (cross bars).

[0019] (3) Registration of dimensional and geometric tolerances Next, among the dimensions, dimensional tolerances, and geometric tolerances, which are parameters associated with each feature shape of the designed press-processed product and define the dimensions and position of each feature shape, the dimensional tolerances and geometric tolerances are registered in the server 102 or the cloud computer 110. This is because the dimensions can be read directly from CAD data by the server 102 or the cloud computer 110. The dimensional tolerances are parameters that define the error range of the dimensions of each feature shape, and examples of these include the allowable error in the radius R of blanking R, the allowable error in the boss height, the allowable error in the diameter of a round hole, and the allowable error range in the width of the hole. The geometric tolerances are parameters that define the shape and position of the feature shape, and include position tolerances, distance tolerances, shape tolerances, and attitude tolerances. The position tolerances represent the allowable error range for the position of each feature shape in the press-processed product. The distance tolerances represent the allowable error range for the distance between each feature shape and the outer periphery of the press-processed product, and the distance between two feature shapes. The form tolerance represents the range of deviation allowed from the geometric shape required for the feature. The orientation tolerance represents the range of error allowed for the orientation relative to the datum. The dimensional tolerance and geometric tolerance may be registered by inputting the dimensional tolerance and geometric tolerance based on the CAD data using the computing device 104, or may be registered by reading the dimensional tolerance and / or geometric tolerance from the CAD data on the server 102 or the cloud computer 110.

[0020] Although not shown in FIG. 2, before or after registering the dimensional tolerances and geometric tolerances, the material of the workpiece, the machining direction (machining reference surface, press direction), the feed direction (rolling direction), coordinates in the three-dimensional model (or CAD data), etc. may be registered or input on the computing device 104.

[0021] (4) Judgment on the suitability of press processing In press working, each feature shape cannot always be freely formed, and certain processing constraints are imposed on the feature shape. Specifically, each feature shape is imposed with processing constraints defined by pre-registered limit dimensions, limit dimensional tolerances, and limit geometric tolerances due to processing reasons.

[0022] The limit dimension is the processing limit value of the dimension, which is a parameter that defines each characteristic shape. This limit value is determined using factors such as the material, thickness (plate thickness), shape, drawing rate, hole expansion rate, bending lambda value of the material contained in the processed material, press direction during press processing, press pressure, rolling direction, processing reference surface, and process sequence. The material includes tensile strength, yield stress, elongation, shear resistance, and Lankford value. For example, if the characteristic shape is "bend R", the minimum radius that can be formed is specified as the limit dimension. Similarly, the radius R of blanking R, the maximum height of the boss, the minimum diameter of a round hole, and the minimum width of the cut are specified as limit dimensions.

[0023] The limit dimensional tolerance is a parameter that defines each feature shape, and represents the limit (minimum) value of dimensional error. The limit dimensional tolerance is also determined using the above-mentioned factors. For example, in the case of blanking R, the limit dimensional tolerance is the range of variation in radius R that is unavoidable during processing. In the case of burring, the limit dimensional tolerance is the range of variation in the inner diameter, outer shape, height, etc.

[0024] The limit geometric tolerance is the limit value (minimum value) of the unavoidable variation in the processing of the parameters of each feature shape, such as position tolerance, shape tolerance, and orientation tolerance. For example, in the example shown in Figure 3, the limit values ​​include the limit values ​​of the variation in the positions of holes, bosses, burring, and blanking R, the limit value of the variation in the deviation between the center of the inner diameter and the center of the outer diameter of the burring, and the limit value of the variation in the direction of the holes. Furthermore, the limit geometric tolerance includes the limit value of the variation in the distance between feature shapes. In the example shown in Figure 3, the geometric tolerance includes the limit values ​​of the variation in the distance between holes and bends, the distance between holes, etc.

[0025] When the dimensions (design dimensions), dimensional tolerances (design dimensional tolerances), and geometric tolerances (design geometric tolerances) of a pressed product at the time of design satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances, respectively, it is highly likely that the designed characteristic shape of the pressed product can be realized by press working, and it can be determined that the pressed product can be manufactured as designed. Conversely, when at least one of the design dimensions, design dimensional tolerances, and design geometric tolerances does not satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances, respectively, it is not possible to realize the designed characteristic shape of the pressed product by press working, resulting in the occurrence of defective products.

[0026] Furthermore, even if the design dimensions, design dimensional tolerances, and design geometric tolerances of the press-formed product satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances, respectively, if these characteristic shapes are too close, it may not be possible to form the bends and holes as designed. For example, in the example shown in Figure 3, even if the design dimensions, design dimensional tolerances, and design geometric tolerances of the characteristic shapes of the bend R and the hole located to the right of it satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances, respectively, if they are too close, problems such as deformation of the hole during processing and an increase in the dimensional tolerance and geometric tolerance of the bend R will occur, and as a result, the characteristic shape of the manufactured press-formed product will no longer satisfy the design dimensions, design dimensional tolerances, design geometric tolerances, etc.

[0027] For this reason, in this design support method, for each characteristic shape, the critical dimension, critical dimensional tolerance, critical geometric tolerance, and the minimum value of the distance (hereinafter referred to as margin distance) to the outer periphery of another characteristic shape or a pressed product (hereinafter referred to as margin distance) are compiled as a characteristic shape detection script according to the relationship between the material contained in the processed material and the thickness (plate thickness), shape, drawing rate, hole expansion rate, and bending λ value of the material, as well as factors such as the press direction, press pressure, rolling direction, processing reference surface, and process sequence during press working, and the information written in the characteristic shape detection script, i.e., the know-how in press working, is scripted and stored in server 102. As an example, a part of the characteristic shape detection script when the characteristic shape is blanking is shown in FIG. As exemplified here, each characteristic shape detection script compiles not only processing precautions based on elements such as the material quality, thickness (plate thickness), shape, drawing rate, hole expansion rate, bending λ value of the material contained in the workpiece, as well as the press direction, press pressure, rolling direction, processing reference plane, and process sequence during press processing, but also calculation scripts, i.e., limit dimensions, limit dimensional tolerances, limit geometric tolerances, limit margin distances, and calculation formulas for determining these for each characteristic shape, and by referring to this information, it is possible to understand all of the know-how for each processing process.

[0028] In other words, the calculation script summarizes the machining constraints, and the machining constraints include limit values ​​and / or calculation formulas for calculating the limit values ​​of each parameter that defines the characteristic shape, which are determined by the various elements described above. In addition, the machining constraints, i.e., the limit values ​​and the calculation formulas for calculating the limit values, are set to a certain number (for example, 10 2 More than 10 times 6 Less than or equal to 10 3 More than 10 times 4 It is determined according to the above factors, based on the machining results of a certain number of machining operations or less. By using the machining constraint conditions determined based on the machining results of a certain number of operations, if all of the limit dimensions, limit dimensional tolerances, limit geometric tolerances, and limit margin distances are satisfied, it can be determined that a press-processed product that can be realized not only in the prototype stage but also in the mass production process can be provided.

[0029] Then, the server 102 or the cloud computer 110 analyzes each of the characteristic shapes. Specifically, based on the characteristic shape detection script, the above-mentioned various factors are considered to determine whether the design dimensions, the design dimensional tolerances, and the design geometric tolerances satisfy the limit dimensions, the limit dimensional tolerances, and the limit geometric tolerances, respectively, and also determine whether the margin distance (design margin distance) at the time of designing the pressed product is equal to or greater than the limit margin distance. If the design dimensions, the design dimensional tolerances, and the design geometric tolerances satisfy the limit dimensions, the limit dimensional tolerances, and the limit geometric tolerances, respectively, and the design margin distance is equal to or greater than the limit margin distance, the characteristic shape is determined to be machineable. Conversely, if any of the design dimensions, the design dimensional tolerances, and the design geometric tolerances does not satisfy the limit dimensions, the limit dimensional tolerances, and the limit geometric tolerances, respectively, or if the design margin distance is below the limit margin distance, the characteristic shape is determined to be unmachinable.

[0030] The result of the judgment as to whether machining is possible or not is transmitted from the server 102 to the computing device 104, and is displayed on the display device of the computing device 104 according to the command of the design support program installed in the computing device 104. The display method is arbitrary, and for example, as shown in Fig. 5, the display area of ​​the display device may be divided into a plurality of areas, and an analysis list in which the characteristic shapes and their parameters (design dimensions, design dimensional tolerances, design geometric tolerances), constraints imposed on the characteristic shapes (limit dimensions, limit dimensional tolerances, limit geometric tolerances, limit margin distances, etc.) are summarized, and the judgment results and the reasons thereof may be displayed in a part of the display area. This allows not only the result of whether machining is possible, but also the reason why machining is not possible to be understood quickly. Although not shown, a display method in which an input area is provided in the analysis list and any information can be input may be adopted.

[0031] Furthermore, the CAD data and the three-dimensional model of the designed press product may be displayed. The design support program may be configured so that the CAD data can be enlarged and moved, and the three-dimensional model can be moved, rotated, and enlarged using a pointing device. Furthermore, although not shown, the design support program may be configured so that by selecting a feature shape in the analysis list, the corresponding feature shape is displayed in color or highlighted (highlighted) in the CAD data or the three-dimensional model, and / or a feature shape script (or a calculation script) corresponding to the feature shape is displayed on the display device. Conversely, the design support program may be configured so that by selecting a feature shape in the three-dimensional model of the CAD data, the corresponding feature shape in the analysis list and its feature shape script (or a calculation script) appear on the display screen. Furthermore, as shown in FIG. 5, the design support program may be configured so that by selecting a feature shape in the analysis list and / or a feature shape in the three-dimensional model or the CAD data, the corresponding feature shape detection script can be displayed. This allows the accumulated know-how for each feature shape to be viewed in a timely manner. Furthermore, when a feature shape is prototyped (described later), an icon, button, or input area for indicating this may be provided.

[0032] If it is determined that the product can be machined according to the designed CAD data, there are no design problems, so the flow of this design support method is terminated and the press-formed product can be manufactured. Conversely, if it is determined that the product cannot be machined, if the design change of the press-formed product is acceptable, the CAD data can be modified, the CAD data can be reloaded, the characteristic shape can be extracted, and it can be determined whether or not the product can be machined. Then, the design change can be repeated until the product can be machined.

[0033] However, if the functions and characteristics required for the press-processed product cannot be realized by design changes, the design cannot be changed, and as a result, it becomes impossible to manufacture a press-processed product that reflects the designer's intention. Furthermore, if design changes are the only measure to obtain a judgment that the product can be processed, improvement and innovation of press processing technology cannot be expected. For this reason, the present design support method may provide a function to encourage prototype processing (challenge) under stricter processing constraints than the processing constraints accumulated as know-how.

[0034] In this case, specifically, the computing device 104 requests the server 102 to transmit the past analysis results of the extracted characteristic shape, that is, the analysis results of other pressed products having the characteristic shape, and displays the received analysis results on the computing device 104. For example, an appropriate icon or button is provided on the display screen, and the server 102 is requested to transmit the past analysis results by selecting the icon or button. Furthermore, the design support program is configured to display the received past analysis results on the display device. The format for displaying the analysis results can be determined arbitrarily. For example, as shown in FIG. 6, the analysis results may be displayed as a performance list in which the material, thickness (plate thickness), limit dimension, limit dimensional tolerance, design dimension, design dimensional tolerance, etc. of the workpiece material are listed for the characteristic shape analyzed in the past. Although not shown, the performance list may include the limit margin distance, the product name of the pressed product, the customer name, the product number, the product size, and the name or identification code that specifies the press equipment and the die used. Furthermore, a characteristic shape script (or a calculation script) corresponding to the characteristic shape analyzed in the past may be displayed.

[0035] Furthermore, the track record list may include an indication of past challenges, i.e., whether or not there are past trials in which a feature shape that does not satisfy the limit dimension, limit dimension tolerance, or limit geometric tolerance, or a feature shape whose design margin distance is below the limit margin distance, and the results of past challenges. In the challenge, appropriate measure dimensions, measure dimensional tolerances, measure geometric tolerances, and measure margin distances are set, and feature shapes are prototyped according to them. The measure dimensions are the dimensions of the feature shape set in the prototype, and are set to be the same as the design dimensions or limit dimensions, or between them. The measure dimensional tolerances are the dimensional tolerances of the feature shape set in the prototype, and are set to be the same as the design dimension tolerances or limit dimension tolerances, or between them. The measure geometric tolerances are the geometric tolerances of the feature shape set in the prototype, and are set to be the same as the design geometric tolerances or limit geometric tolerances, or between them. The measure margin distances are the margin distances of the feature shape set in the prototype, and are set to be the same as the design margin distances or limit margin distances, or between them. In this design support method, past challenge results are displayed on a display device, allowing the user to quickly refer to past results. Therefore, even if the design dimensions, design dimensional tolerances, or design geometric tolerances do not satisfy the limit dimensions, limit dimensional tolerances, or limit geometric tolerances, respectively, or the design margin distance is below the limit margin distance, it is possible to provide know-how, i.e., information for determining whether machining is possible under stricter conditions beyond the machining conditions specified in the feature shape detection script, by taking into consideration similar past results and challenge results.

[0036] In order to further promote the challenge of press working under stricter constraints, the difference between the critical dimension and the design dimension, the difference between the critical dimension tolerance and the design dimension tolerance, the difference between the critical geometric tolerance and the design geometric tolerance, and the difference between the design margin distance and the critical margin distance may be displayed on the display device of the computing device 104. Alternatively, the design support program may be configured to highlight those in which these differences are within a certain range. For example, the design support program may be configured to selectively display or highlight past results in which the above differences are within 5%, 10%, 20%, or 30%. This allows prediction of new challenge results to be foreseen. In addition, the design support program may be configured to sort the results list. Examples of sorting items include material, plate thickness, dimensions of characteristic shapes (for example, bending radius R when the characteristic shape is bent), calculation scripts or limit values ​​of each parameter, product name of the pressed product, customer name, product number, product size, and names or identification codes that identify the press equipment or mold used. This allows efficient reference to past analysis results and challenge results for similar characteristic shapes. Furthermore, the design support program may be configured to provide links to each past achievement, allowing access to documents such as reports summarizing the challenge results. These documents are stored in the storage device of the server 102. Furthermore, the design support program may be configured to allow past analysis results to be searched for using keywords, etc.

[0037] If the challenge does not satisfy the required dimensions, dimensional tolerances, or geometric tolerances, the design will have to be changed. However, if the challenge is successful, that is, if a certain number of prototypes equivalent to mass production (for example, 10 2 More than 10 times 6 Less than or equal to 10 3 More than 10 times 4If the measure dimensions, measure dimensional tolerances, or measure geometric tolerances are satisfied in the first prototype (three or fewer prototypes), it can be determined that the characteristic shape can be realized without making any design changes or by making only minor design changes. Therefore, this design support method makes it possible to manufacture press-processed products having more diverse shapes without being bound by processing constraints based on past know-how. It is also possible to improve press processing technology (for example, improve die design technology, press method, and press equipment performance) through challenges. Furthermore, by accumulating success in challenges, it is possible to update the processing constraints such as limit dimensions, limit dimensional tolerances, limit geometric tolerances, and limit margin distances that have been accumulated as know-how to the measure dimensions, measure dimensional tolerances, measure geometric tolerances, and measure margin distances, respectively. In other words, it is possible to update the current processing constraints to new processing constraints that are more relaxed. Therefore, it is possible to build technology for manufacturing press-processed products having more complex and diverse shapes. This not only makes it possible to support the design of press-processed products without relying on the experience and intangible know-how of workers, but also to expand the diversity of press-processed products and improve and pass on press processing technology.

[0038] 3. Design Support Program A design support method according to an embodiment of the present invention can be implemented by the above-described design support system 100 and a design support program installed in the computing device 104. Thus, one embodiment of the present invention is a design support program for causing the computing device 104 to execute some or all of the above-described processes in press working.

[0039] A computer-readable recording medium on which the design support program is recorded is also one of the embodiments of the present invention. Examples of the computer-readable recording medium include a magnetic medium such as a hard disk, a flexible disk, and a magnetic tape, an optical medium such as a CD-ROM or a DVD, a magneto-optical medium such as a floptical disk, and a hardware device configured to store and execute the design support program, such as a ROM, a RAM, a flash memory, etc. The design support program includes not only machine code such as that generated by a compiler, but also high-level language code executed by a server using an interpreter, etc. The design support program is installed in the computing device 104 from the computer-readable medium. The design support program may be downloadable from the network 120 to the computing device 104.

[0040] The above-described embodiments of the present invention may be combined as appropriate as long as they are not mutually inconsistent. In addition, a display device according to any of the embodiments may be combined as appropriate by a person skilled in the art to add or remove components or modify the design, or to add or omit steps or modify conditions, and the combination is included in the scope of the present invention as long as it includes the gist of the present invention.

[0041] Even if there are other effects and advantages different from those brought about by the aspects of each of the above-mentioned embodiments, those that are clear from the description in this specification or that can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0042] 100: design support system, 102: server, 104: computing device, 110: cloud computer, 120: network

Claims

1. Extracting characteristic shapes from computer-aided data of press-formed products, and The characteristic shape is analyzed, and based on the pre-registered processing constraints for the characteristic shape, To determine whether the design dimensions, design dimensional tolerances, and design geometric tolerances of the aforementioned characteristic shape satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances that determine the machining constraint conditions, and This includes determining whether the margin distance, which is the distance from the characteristic shape to the outer circumference of the pressed product and / or to other characteristic shapes, is greater than or equal to the minimum value of the margin distance, which is the limit margin distance. A method for designing a press-formed product, wherein the processing constraints include limit values ​​for parameters defining the characteristic shape, which are determined using the material, thickness, shape, drawing ratio, hole expansion ratio, and λ value of the workpiece, as well as the pressing direction, pressing pressure, rolling direction, processing reference surface, and process sequence during press working.

2. The design support method according to claim 1, further comprising determining whether the characteristic shape can be realized by press working.

3. The design support method according to claim 2, further comprising displaying the analysis results of other press-formed products that have been analyzed in the past with respect to the aforementioned characteristic shape.

4. The aforementioned analysis results include the following for other press-formed products that have been analyzed in the past: The material and thickness of the workpiece, The limit dimensions, limit dimensional tolerances, and limit geometric tolerances of the aforementioned characteristic shape, The design dimensions, design dimensional tolerances, and design geometric tolerances of the aforementioned characteristic shape, The countermeasure dimensions, dimensional tolerances, and geometric tolerances for the aforementioned characteristic shape, The results of the above determination, and This includes the results obtained when the workpiece is press-formed with the aforementioned countermeasure dimensions, dimensional tolerances, or geometric tolerances. The aforementioned limit dimension, limit dimensional tolerance, and limit geometric tolerance are the dimension, dimensional tolerance, and geometric tolerance, respectively, that determine the machining constraint conditions. The aforementioned design dimensions, design dimensional tolerances, and design geometric tolerances are the dimensions, dimensional tolerances, and geometric tolerances of the characteristic shape at the time of design, respectively. The design support method according to claim 3, wherein the countermeasure dimension, the countermeasure dimensional tolerance, and the countermeasure geometric tolerance are, respectively, a dimension set between the limit dimension and the design dimension, a dimensional tolerance set between the limit dimensional tolerance and the design dimensional tolerance, and a geometric tolerance set between the limit geometric tolerance and the design geometric tolerance.

5. The design support method according to claim 4, further comprising sorting the analysis results by the material, thickness, limit value, or parameter of the workpiece.

6. The design support method according to claim 1, further comprising displaying a calculation script that includes the aforementioned limit values.

7. The analysis results include the design margin distance, limit margin distance, and countermeasure margin distance of the characteristic shape of other press-formed products analyzed in the past. The design margin distance is a first distance which is the distance between the feature shape and another feature shape or the distance between the feature shape and the outer circumference of the other press-formed product at the time of designing the feature shape. The limit margin distance is a second distance which is the distance between the characteristic shape that determines the processing constraint conditions and another characteristic shape, or the distance between the characteristic shape and the outer circumference of the other press-formed product. The design support method according to claim 4, wherein the countermeasure margin distance is a distance set between the first distance and the second distance.

8. When the design dimensions, design dimensional tolerances, or design geometric tolerances of the characteristic shape of the press-formed product do not satisfy the limit dimensions, limit dimensional tolerances, or limit geometric tolerances, respectively, the design dimensions, design dimensional tolerances, or design geometric tolerances are changed to corrective dimensions, corrective dimensional tolerances, or corrective geometric tolerances, respectively. Manufacturing the press-formed product with the aforementioned countermeasure dimensions, the aforementioned countermeasure dimensional tolerances, or the aforementioned countermeasure geometric tolerances, and If the dimensions, dimensional tolerances, and geometric tolerances of the characteristic shape in the manufactured press-formed product satisfy the countermeasure dimensions, countermeasure dimensional tolerances, and countermeasure geometric tolerances, respectively, the method further includes updating the limit dimensions, limit dimensional tolerances, or limit geometric tolerances to the countermeasure dimensions, countermeasure dimensional tolerances, or countermeasure geometric tolerances, respectively. The aforementioned limit dimension, limit dimensional tolerance, and limit geometric tolerance are the dimension, dimensional tolerance, and geometric tolerance, respectively, that determine the machining constraint conditions. The aforementioned design dimensions, design dimensional tolerances, and design geometric tolerances are the dimensions, dimensional tolerances, and geometric tolerances of the characteristic shape at the time of design, respectively. The design support method according to claim 1, wherein the countermeasure dimension, the countermeasure dimensional tolerance, and the countermeasure geometric tolerance are, respectively, a dimension set between the limit dimension and the design dimension, a dimensional tolerance set between the limit dimensional tolerance and the design dimensional tolerance, and a geometric tolerance set between the limit geometric tolerance and the design geometric tolerance.

9. Server, and Includes a computing device connected to the server so as to be able to communicate with the server, The aforementioned server, Extracting characteristic shapes from computer-aided data of press-formed parts, The processing constraints for the aforementioned characteristic shape are stored, Analyze the characteristic shape and, based on the processing constraints, It is determined whether the design dimensions, design dimensional tolerances, and design geometric tolerances of the aforementioned characteristic shape satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances that determine the machining constraint conditions, respectively. It is determined whether the margin distance, which is the distance from the characteristic shape k to the outer circumference of the press-formed product and / or to other characteristic shapes, is greater than or equal to the minimum value of the limit margin distance. The system is configured to transmit the result of the determination to the computing device. The computing device is The computer-aided data is transmitted to the server. The system is configured to display the result of the determination, A design support system for press-formed parts, wherein the processing constraints include limit values ​​for parameters defining the characteristic shape, determined using the material, thickness, shape, drawing ratio, hole expansion ratio, and λ value of the workpiece, as well as the pressing direction, pressing pressure, rolling direction, processing reference surface, and process sequence during press working.

10. The design support system according to claim 9, wherein the server is further configured to determine whether or not the characteristic shape can be realized by press working.

11. The server is further configured to store the analysis results of other press-formed products that have been analyzed in the past with respect to the characteristic shape, and to transmit them to the computing device. The design support system according to claim 10, wherein the computing device is further configured to display the analysis results.

12. The aforementioned analysis results include the following for other press-formed products that have been analyzed in the past: The material and thickness of the workpiece, The limit dimensions, limit dimensional tolerances, and limit geometric tolerances of the aforementioned characteristic shape, The design dimensions, design dimensional tolerances, and design geometric tolerances of the aforementioned characteristic shape, The countermeasure dimensions, dimensional tolerances, and geometric tolerances for the aforementioned characteristic shape, The result of the above determination, and This includes the results obtained when the workpiece is press-formed with the aforementioned countermeasure dimensions, dimensional tolerances, or geometric tolerances. The aforementioned limit dimension, limit dimensional tolerance, and limit geometric tolerance are the dimension, dimensional tolerance, and geometric tolerance, respectively, that determine the machining constraint conditions. The aforementioned design dimensions, design dimensional tolerances, and design geometric tolerances are the dimensions, dimensional tolerances, and geometric tolerances of the characteristic shape at the time of design, respectively. The design support system according to claim 11, wherein the countermeasure dimension, the countermeasure dimensional tolerance, and the countermeasure geometric tolerance are, respectively, a dimension set between the limit dimension and the design dimension, a dimensional tolerance set between the limit dimensional tolerance and the design dimensional tolerance, and a geometric tolerance set between the limit geometric tolerance and the design geometric tolerance.

13. The analysis results include the design margin distance, limit margin distance, and countermeasure margin distance of the characteristic shape of other press-formed products analyzed in the past. The design margin distance is a first distance which is the distance between the feature shape and other feature shapes or the distance between the feature shape and the outer circumference of the press-formed product at the time of designing the feature shape. The limit margin distance is a second distance which is the distance between the characteristic shape that determines the processing constraint conditions and another characteristic shape, or the distance between the characteristic shape and the outer circumference of the press-formed product. The design support system according to claim 11, wherein the countermeasure margin distance is a distance set between the first distance and the second distance.

14. The design support system according to claim 11, wherein the computing device is configured to sort the analysis results by the material, thickness, limit value, or parameters of the workpiece.

15. The design support system according to claim 9, wherein the computing device is further configured to display a calculation script including the limit values.

16. A computing device connected to a server configured to extract characteristic shapes of press-formed parts from computer-aided data, To transmit the aforementioned computer-aided data to the server, Based on the processing constraints of the feature shape stored in the server, the server receives the results of its determination of whether the design dimensions, design dimensional tolerances, and design geometric tolerances of the feature shape satisfy the limit dimensions, limit dimensional tolerances, and limit geometric tolerances that determine the processing constraints, respectively, and whether the margin distance, which is the distance from the feature shape to the outer circumference of the press-formed product and / or to other feature shapes, is greater than or equal to the minimum value of the limit margin distance. The system is configured to display the result of the aforementioned determination, A design support program for press-formed parts, wherein the processing constraints include limit values ​​for parameters defining the characteristic shape, determined using the material, thickness, shape, drawing ratio, hole expansion ratio, and λ value of the workpiece, as well as the pressing direction, pressing pressure, rolling direction, processing reference surface, and process sequence during press working.

17. The design support program according to claim 16, further configured to cause the computing device to receive the result of the server determining whether or not the characteristic shape can be realized by press working.

18. The design support program according to claim 17, further configured to cause the computing device to receive and display the analysis results of other press-formed products whose characteristic shapes have been previously analyzed, which are stored in the server.

19. The aforementioned analysis results include the following for other press-formed products that have been analyzed in the past: The material and thickness of the workpiece, The limit dimensions, limit dimensional tolerances, and limit geometric tolerances of the aforementioned characteristic shape, The design dimensions, design dimensional tolerances, and design geometric tolerances of the aforementioned characteristic shape, The countermeasure dimensions, dimensional tolerances, and geometric tolerances for the aforementioned characteristic shape, The results of the above determination, and The workpiece is subjected to the aforementioned countermeasure dimensions, dimensional tolerances, or geometric tolerances. The aforementioned limit dimensions, dimensional tolerances, and geometric tolerances are the dimensions, tolerances, and geometric tolerances that determine the machining constraints, respectively. The aforementioned design dimensions, design dimensional tolerances, and design geometric tolerances are the dimensions, dimensional tolerances, and geometric tolerances of the characteristic shape at the time of design, respectively. The design support program according to claim 18, wherein the countermeasure dimension, the countermeasure dimensional tolerance, and the countermeasure geometric tolerance are, respectively, a dimension set between the limit dimension and the design dimension, a dimensional tolerance set between the limit dimensional tolerance and the design dimensional tolerance, and a geometric tolerance set between the limit geometric tolerance and the design geometric tolerance.

20. The analysis results include the design margin distance, limit margin distance, and countermeasure margin distance of the characteristic shape of other press-formed products analyzed in the past. The design margin distance is a first distance which is the distance between the feature shape and other feature shapes or the distance between the feature shape and the outer circumference of the press-formed product at the time of designing the feature shape. The limit margin distance is a second distance which is the distance between the characteristic shape that determines the processing constraint conditions and another characteristic shape, or the distance between the characteristic shape and the outer circumference of the press-formed product. The design support program according to claim 18, wherein the countermeasure margin distance is a distance set between the first distance and the second distance.

21. The design support program according to claim 18, configured to cause the computing device to sort the analysis results by the material, thickness, limit value, or parameter of the workpiece.

22. The design support program according to claim 16, further configured to cause the computing device to display a calculation script including the limit value.

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